Determination of Selenium Concentration in Sixty Five Reference Materials for Geochemical Analysis by GFAAS after Separation with Thiol Cotton

Wiley - Tập 25 Số 2-3 - Trang 317-324 - 2001
Luc Marin1, Jitka Lhomme1, Jean Carignan1
1Centre de Recherches Pétrographiques et Géochimiques, CNRS, 15, rue Notre Dame des Pauvres, B.P. 20, 54501 Vandoeuvre lès Nancy Cedex, France. e‐mail: [email protected]‐nancy.fr

Tóm tắt

Selenium has been determined in sixty five geological reference materials of different origins by graphite furnace atomic absorption spectrometry. Samples were decomposed with a mixture of nitric and hydrofluoric acids. Selenium was reduced to SeIV with hydrochloric acid, and then fixed and separated from the matrix on thiol cotton. After digestion of the thiol cotton in hot nitric acid, the Se concentration was measured using palladium and magnesium nitrates as a matrix modifier. The limit of determination was 0.02 μg g−1, the precision of the results (relative standard deviation of 3 to 8 replicates) varied from 2.6 to 17.7% with an average of 7.9% in the range 0.02‐42.7 μg g−1 and was similar to the value obtained for synthetic samples. Our results are in good agreement with available literature values.

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Thông tin xuất bản

Wiley

Tập 25 Số 2-3

317-324

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